diff --git a/src/external_interfaces_dot.f90 b/src/external_interfaces.f90
similarity index 92%
rename from src/external_interfaces_dot.f90
rename to src/external_interfaces.f90
index f4f42fd..523aa30 100644
--- a/src/external_interfaces_dot.f90
+++ b/src/external_interfaces.f90
@@ -1,4 +1,4 @@
-module external_interfaces
+module external_interfaces_dot
 
    use kinds
 
@@ -29,4 +29,4 @@ end function ddot
 #endif
    end interface
 
-end module external_interfaces
+end module external_interfaces_dot
diff --git a/src/fordot_options.f90 b/src/fordot_options.f90
index 7a70080..e3dec08 100644
--- a/src/fordot_options.f90
+++ b/src/fordot_options.f90
@@ -35,7 +35,7 @@ end function dot_R0R1R1_rel_opts
 
    !> author: Seyed Ali Ghasemi
    pure function md_2(u,v) result(a)
-      use external_interfaces
+      use external_interfaces_dot
       real(rk), dimension(:), intent(in), contiguous :: u, v
       real(rk)                                       :: a